Active Choices and referencing a parameter

[Reuben Popp]

Good morning/afternoon, I hope that this list is just low traffic and not dead.

I'm trying to set up a dynamic reference parameter in a Jenkinsfile and am struggling a bit with how to reference the value of a previous option.  Note the code below; where Target is used, I have attempted appending it to the cmd using + as well as the provided way below.  Both ways return my select as empty.  What is the proper way to reference another, earlier used option from the Jenkinsfile?  I see that it is getting set by watching the javascript console:

Values retrieved from Referenced Parameters: DeployLegacyBackend=No__LESEP__Target=FOO

Also, note my println entries.  Given that I have added a logger in Jenkins for biouno, should I not see entries for these?  What is the best way to debug scripts here?

Thanks in advance!
Reuben

For example, 

        [$class: 'DynamicReferenceParameter',
            choiceType: 'ET_FORMATTED_HTML',
            omitValueField: true,
            description: 'Choose a legacy backend install file.',
            name: 'LegacyBackendInstallFile',
            randomName: 'choice-parameter-5631314456178624',
            referencedParameters: 'DeployLegacyBackend,Target',
            script: [
                $class: 'GroovyScript',
                fallbackScript: [
                    classpath: [],
                    sandbox: true,
                    script: 'return[\'Listing not available.....\']'
                ],
                script: [
                    classpath: [],
                    sandbox: true,
                    script: '''
                        def rawFileList = []
                        def htmlOut = '<select id="install_file">'

                        def cmd = "gsutil ls gs://some-cloud-storage-bucket/Target | grep install.tar.gz"
                        def proc = ['sh', '-c', cmd].execute()
                        proc.waitFor()
                        def rawOutString = proc.text
                        println("rawOutString is [" + rawOutString + "].")
                        def rawOut = rawOutString.split('\\n')

                        rawOut.each { item ->
                            def tmpFile = item
                            println("tmpFile is [" + tmpFile + "].")
                        }
                        htmlOut += '</select>'

                        return htmlOut
                    '''
                ]
            ]
        ],

[Reuben Popp]

Pinging the group again, per Bruno's request.

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